Attachment-plug.



H. R. SARGENT.

ATTACHMENT PLUG. -APPLlcATloN man dsc. 10,1914

i Patenfed Oct.. 31,1916.

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HOABD B. SARGENT, F SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A. CORPORATION OF NEW YORK. v

.ATTACHMENT-PLUG.

Specification of Letters Patent.

Patented Oct. 31, 1916.

Application filed December 10, 1914. Serial No. 876,433.

features' and details of constructions and Ymaterial.

combinations and arrangements of parts that can best be presented by the description of particular devices embodying' them in the best forms at present known to me.

Many advantages obtainable` in connection with the invention will appear from this description.-such as simplicity and ruggedness of construction. neatness of appearance, and ease and cheapness of manufacture,- while its scope will be indicated in my claims.

n the accompanying drawing, Figure 1 is a side view of a complete separable plug device embodying my invention. Figs. 2 and 3 are mid-sectional views of the separated parts or members of the device shownl in Fig. 1. Fig. 4 is a plan view of the part shown in Fig. 2. Fig. 5 is a fragmentary side view of a modified part corresponding to that shown in Fig. 2. Fig. 6 is a mid-sectional view of a modified part corresponding to that shown in Fig. 3 and adapted to be used with that shown in Fig, 5.

The attachment .plug shown in Figs. 1, 2, 3 and 4 comprises a base or plug member proper 1 adapted for insertion in an` incandescent lamp socket or receptacle and ,a member 2 (conveniently termed the cap member) adapted to be secured to the conductor cord or cable 3. The base memberl comprises a body structure 4- (see Fig. 2) shown as consisting of a single piece of porcelain. liber. compound, or other insulating On 'the lower end of the body 4 is a shell 5 which is secured byhaving.its upper edge rolled or otherwise pressed into un exterior circumferential groove in said body. As the plug shown is intended for a socket or receptacle of the Edison screw type, the shell 5 is a screw-threaded Contact or terminal shell. A center contact or terminal 6 is secured to a reduced lower portion 7 of the body 4 by a bolt 8. In the insulating body 4 are narrow rectangular openings 10, 10 (see Figs. 2 and 4), shown as of uniform .size and as extending from end to end completely through it; and in theseopenings are contacts 11,'12 that lie flat against their outer or remote sides but are slightly bentV inward toward one another at their upper ends, just within the mouths of the openings 10, 10. The contact 11 is in the form of a narrow metal strip, and it is Secured in place and electrically connected to the contact shell 5 by being bent outward at its lower end and riveted to said shell at 13. The contact 12 consists of a similar strip secured and electrically connected to the center contact or terminal 6, which is shown as consisting of its enlarged end. The strip 12 is bent so as to lie snug against the body portion 7 and also bent or joggled where it en` ters its opening 10, the lower end or bottom of the shell 5 being cut away at this point so as to insure against short-circuiting. Turning of the shell 5 on the body 4 is prevented by engagement of the lower end of the contact strip J1l in an appropriate recess in said bod-y.

'lhe cap member 2 comprises a cap structure proper 14 (see Fig. 3) .shown as a single piece of insulating material and-a pair of contact members 15, 15 projecting downward from it. Each of the contact members 15. 15 has at its outer side a ref siliently yielding contact portion 16 extendinar from its outer end back toward the cap structure 14. As shown, the contact portion 16 consists of a thin, springy strip of metal, and it is riveted at 17 to a tolerably thin but rigid metal strip 18 that forms the main portion of the contact member 15 and is secured to the cap structure 14. The end of the strip 16 is bent across that of the strip ,18 so'as to Prevent the former from turning on Ithe rivet 17 with reference to the latter. The configuration of the cap structure 14, the securing of the strips 18 to it, and the provisions for connecting the conductors of the cord 3 to these strips require no departure from common practice and so need not he described in detail. n

It will he seen that when the contact members l5, l5 are introduced into the openings 10, l0 and pushed home their contact portions 1G, 16 will be deflected inward toward one another and will engage between the contact strips 11, 12, their free ends catching or interlocking with the bent ends of said strips 11, l2 "so that the cap 2 will not be too easily separated from the base l. The mounting of the springy contact means on the cap connector device instead of in the hase device as heretofore offers a great advantage in that it makes said contact means at once accessible :for readjiistment or replacement in case of deformation or breakage.

The modified construction shown in' Fig. 5 differs from that shown in Figs; 1, 2, and lin that the contact strips 21, 22 are at the inner adjacent sides of they openings 20, 2? and that the general construction and arrangement of the parte is like that shown iny United States Patent No.L 1,115,654,- No'- tomber 3, 19M. De Beamer. The construction shown Fig. 6 differs correspondingly from that of Fig. 3 in" that the springy contact strips 2G, 26 are at the inner', adjacent sides of lthe rigid strips28 and are merely soldered, hrazed, or welded to them. They can he repaired or replaced with the samefacility as those of the constriction'shown in Figs. l, 2, 8 andi. e

Obviously the cap connector devices shown' in Figs. 3 and can be used With suitable fixed wall receptacle devi-ces or the like a's Well as with the plug devices shown in Figs. 2 and 5.'

What I claim as new and desire to secure byvLetters Patent of the United States, is,-

l. An electrical connector comprising an insulating body with longitudinally extending openings therein, and contact strips inv comprising rigid portions attached to the cap structure at one end and resiliently yielding contact portions extending from the outer ends of said rigid portions back toward the cap' structure and adapted to'engage the aforesaid. contact strips.

An electrical connector cap member comprising a cap structure and contact members projecting therefrom, said members comprising rigid flat portions attached to the cap structure atl one end and relatively thin resiliently yielding contact portions extending from their outer ends back toward the cap structure'. 4,

3. An electrical connector cap member comprising a cap structure and contact'Ine-nf-v hers projecting therefrom, each of said cotact members comprising a rigid fiat strip attached to the cap structure at one end and a springy strip attached to the outer end of said rigid strip and extending back toward said cap structure.

In Witness whereof, I have hereunto set my hand this 5th day of December, 1914:.

HOWARD B. SARGENT.

Witnesses: 1

BENJAMIN B. HULL, HELEN Onromn 

